Seems like a very minor issue (although of course annoying).
To me - it sounds like a driver issue. Have you tried rolling back to an older version 1 step back?
Did you upgrade from an AMD card? If you did, there might be remnants of the AMD drivers in your system possibly causing that issue.
I don't have that issue with mine - although im using an AMD card.
What happens if you try the game in Full screen mode? Does it do the same thing? Just to test it out.